XML 143 R133.htm IDEA: XBRL DOCUMENT
v3.21.1

Fair value of financial instruments - Balances and Levels of Assets Measured at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financial assets: |  |
Collateral dependent loans |  | $ 23,810
Fair Value, Measurements, Nonrecurring |  |
Financial assets: |  |
Other real estate owned | $ 6,662 | 9,774
Collateral dependent loans | 18,560 | 10,691
Fair Value, Measurements, Nonrecurring | Commercial and industrial |  |
Financial assets: |  |
Collateral dependent loans | 1,728 | 6,481
Fair Value, Measurements, Nonrecurring | Construction |  |
Financial assets: |  |
Collateral dependent loans | 3,877 |
Fair Value, Measurements, Nonrecurring | Residential real estate | 1-to-4 family mortgage |  |
Financial assets: |  |
Collateral dependent loans | 226 | 378
Fair Value, Measurements, Nonrecurring | Residential real estate | Residential line of credit |  |
Financial assets: |  |
Collateral dependent loans | 1,174 | 321
Fair Value, Measurements, Nonrecurring | Commercial real estate | Owner occupied |  |
Financial assets: |  |
Collateral dependent loans |  | 951
Fair Value, Measurements, Nonrecurring | Commercial real estate | Non-owner occupied |  |
Financial assets: |  |
Collateral dependent loans | 3,391 | 2,560
Fair Value, Measurements, Nonrecurring | Consumer and other |  |
Financial assets: |  |
Collateral dependent loans | 8,164 |
Fair Value, Measurements, Nonrecurring | Quoted prices in active markets for identical assets (liabilities) (level 1) |  |
Financial assets: |  |
Other real estate owned | 0 | 0
Collateral dependent loans | 0 | 0
Fair Value, Measurements, Nonrecurring | Quoted prices in active markets for identical assets (liabilities) (level 1) | Commercial and industrial |  |
Financial assets: |  |
Collateral dependent loans | 0 | 0
Fair Value, Measurements, Nonrecurring | Quoted prices in active markets for identical assets (liabilities) (level 1) | Construction |  |
Financial assets: |  |
Collateral dependent loans | 0 |
Fair Value, Measurements, Nonrecurring | Quoted prices in active markets for identical assets (liabilities) (level 1) | Residential real estate | 1-to-4 family mortgage |  |
Financial assets: |  |
Collateral dependent loans | 0 | 0
Fair Value, Measurements, Nonrecurring | Quoted prices in active markets for identical assets (liabilities) (level 1) | Residential real estate | Residential line of credit |  |
Financial assets: |  |
Collateral dependent loans | 0 | 0
Fair Value, Measurements, Nonrecurring | Quoted prices in active markets for identical assets (liabilities) (level 1) | Commercial real estate | Owner occupied |  |
Financial assets: |  |
Collateral dependent loans |  | 0
Fair Value, Measurements, Nonrecurring | Quoted prices in active markets for identical assets (liabilities) (level 1) | Commercial real estate | Non-owner occupied |  |
Financial assets: |  |
Collateral dependent loans | 0 | 0
Fair Value, Measurements, Nonrecurring | Quoted prices in active markets for identical assets (liabilities) (level 1) | Consumer and other |  |
Financial assets: |  |
Collateral dependent loans | 0 |
Fair Value, Measurements, Nonrecurring | Significant other observable inputs (level 2) |  |
Financial assets: |  |
Other real estate owned | 0 | 0
Collateral dependent loans | 0 | 0
Fair Value, Measurements, Nonrecurring | Significant other observable inputs (level 2) | Commercial and industrial |  |
Financial assets: |  |
Collateral dependent loans | 0 | 0
Fair Value, Measurements, Nonrecurring | Significant other observable inputs (level 2) | Construction |  |
Financial assets: |  |
Collateral dependent loans | 0 |
Fair Value, Measurements, Nonrecurring | Significant other observable inputs (level 2) | Residential real estate | 1-to-4 family mortgage |  |
Financial assets: |  |
Collateral dependent loans | 0 | 0
Fair Value, Measurements, Nonrecurring | Significant other observable inputs (level 2) | Residential real estate | Residential line of credit |  |
Financial assets: |  |
Collateral dependent loans | 0 | 0
Fair Value, Measurements, Nonrecurring | Significant other observable inputs (level 2) | Commercial real estate | Owner occupied |  |
Financial assets: |  |
Collateral dependent loans |  | 0
Fair Value, Measurements, Nonrecurring | Significant other observable inputs (level 2) | Commercial real estate | Non-owner occupied |  |
Financial assets: |  |
Collateral dependent loans | 0 | 0
Fair Value, Measurements, Nonrecurring | Significant other observable inputs (level 2) | Consumer and other |  |
Financial assets: |  |
Collateral dependent loans | 0 |
Fair Value, Measurements, Nonrecurring | Significant unobservable inputs (level 3) |  |
Financial assets: |  |
Other real estate owned | 6,662 | 9,774
Collateral dependent loans | 18,560 | 10,691
Fair Value, Measurements, Nonrecurring | Significant unobservable inputs (level 3) | Commercial and industrial |  |
Financial assets: |  |
Collateral dependent loans | 1,728 | 6,481
Fair Value, Measurements, Nonrecurring | Significant unobservable inputs (level 3) | Construction |  |
Financial assets: |  |
Collateral dependent loans | 3,877 |
Fair Value, Measurements, Nonrecurring | Significant unobservable inputs (level 3) | Residential real estate | 1-to-4 family mortgage |  |
Financial assets: |  |
Collateral dependent loans | 226 | 378
Fair Value, Measurements, Nonrecurring | Significant unobservable inputs (level 3) | Residential real estate | Residential line of credit |  |
Financial assets: |  |
Collateral dependent loans | 1,174 | 321
Fair Value, Measurements, Nonrecurring | Significant unobservable inputs (level 3) | Commercial real estate | Owner occupied |  |
Financial assets: |  |
Collateral dependent loans |  | 951
Fair Value, Measurements, Nonrecurring | Significant unobservable inputs (level 3) | Commercial real estate | Non-owner occupied |  |
Financial assets: |  |
Collateral dependent loans | 3,391 | $ 2,560
Fair Value, Measurements, Nonrecurring | Significant unobservable inputs (level 3) | Consumer and other |  |
Financial assets: |  |
Collateral dependent loans | $ 8,164 |

X
- References No definition available. + Details
Name: | us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying amount of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This does not include real estate assets taken in settlement of troubled loans through surrender or foreclosure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_OtherRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fbk_ConstructionPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbk_OneToFourFamilyMortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbk_ResidentialLineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbk_OwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbk_NonOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fbk_ConsumerAndOtherPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |